TY - JOUR AU - R. G. Koplatadze AU - N. L. Partsvaniya TI - Oscillatory properties of solutions of systems of second-order differential equations with deviating arguments JO - Differencialʹnye uravneniâ PY - 1997 SP - 1312 EP - 1320 VL - 33 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1997_33_10_a2/ LA - ru ID - DE_1997_33_10_a2 ER -